[llvm] [SampleFDO] Stale profile call-graph matching (PR #92151)

[via llvm-commits]

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@@ -20,12 +20,31 @@ using namespace sampleprof;
 
 #define DEBUG_TYPE "sample-profile-matcher"
 
+static cl::opt<bool> SalvageRenamedProfile(
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WenleiHe wrote:

Should we remove "rename" here to be consistent? For functions, it's *new* functions, for profiles it's *unused* profile. So maybe: `salvage-unused-profile`? 

https://github.com/llvm/llvm-project/pull/92151